3645801 has 6 divisors (see below), whose sum is σ = 5266170. Its totient is φ = 2430528.

The previous prime is 3645791. The next prime is 3645809. The reversal of 3645801 is 1085463.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 1212201 = 1560^2 + 1101^2 .

It is not a de Polignac number, because 3645801 - 2⁶ = 3645737 is a prime.

3645801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3645809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202536 + ... + 202553.

It is an arithmetic number, because the mean of its divisors is an integer number (877695).

Almost surely, 2^3645801 is an apocalyptic number.

It is an amenable number.

3645801 is a deficient number, since it is larger than the sum of its proper divisors (1620369).

3645801 is a wasteful number, since it uses less digits than its factorization.

3645801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405095 (or 405092 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 3645801 is about 1909.3980726920. The cubic root of 3645801 is about 153.9091075500.

The spelling of 3645801 in words is "three million, six hundred forty-five thousand, eight hundred one".